St James's Gate were the defending champions.
Despite finishing in sixth and eighth place the previous season, Frankfort and YMCA were not re-elected.
Six new teams were elected, extending the League to twelve teams: Athlone Town, Midland Athletic, Pioneers, Rathmines Athletic, Shelbourne United and Shamrock Rovers.
Athlone Town became the first team from outside Dublin to compete in the League.
Two matches were not played: Shamrock Rovers won their first title.